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Author Spotlight: Advancements and Applications in Nanoparticle Synthesis Through Laser Ablation in Liquids
Published on: June 16, 2023
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Laser Ablated Carbon Nanodots for Light Emission
Delfino Reyes1,2, Marco Camacho3, Miguel Camacho4
1Department of Physics, University of North Texas, Denton, TX, USA.
Nanoscale Research Letters
|September 24, 2016
Summary
Researchers synthesized fluorescent carbon nanostructures (CNDs) using laser ablation in acetone. Ablation parameters like laser wavelength and time tune CND size and emission, offering versatile optical properties.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Carbon nanostructures (CNDs) are gaining attention for their unique optical properties.
- Laser ablation in liquid offers a versatile method for nanomaterial synthesis.
Purpose of the Study:
- To synthesize fluorescent carbon dots-like nanostructures (CNDs) via laser ablation.
- To investigate the influence of laser parameters on CND properties.
- To explore the tunability of CND optical emission.
Main Methods:
- Laser ablation of a carbon target in acetone using various laser wavelengths (1064, 532, 355 nm) and irradiation times.
- Characterization using electron microscopy, absorption, and emission spectroscopies.
Main Results:
- Amorphous CNDs (5-20 nm) were successfully synthesized, with abundance dependent on ablation parameters.
- A π- π* electronic transition at 3.76 eV dominated absorption.
- Optimal light emission was achieved with 355 nm ablation, excitation at 3.54 eV, and emission centered at 3.23 eV.
- Emission wavelength was tunable from near-UV to green by controlling ablation time and laser parameters.
Conclusions:
- Laser ablation in liquid is an effective method for producing tunable fluorescent CNDs.
- Ablation parameters significantly influence CND morphology and optical characteristics.
- The synthesized CNDs exhibit promising tunable photoluminescence for various applications.
